<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <link rel="stylesheet" href="tcss/a.css">
    <link rel="stylesheet" media="screen and (min-width:992px) and (max-width:1200px)" href="b.css">
    <title>Title</title>
    <style>
        body {
            background-color: red;
        }

        @media not screen and (min-width: 768px) and (max-width: 992px) {
            body {
                background-color: blue;
            }
        }
    </style>
</head>

<body>

</body>

</html>